热带亚热带植物学报2024，Vol.32Issue(1)：37-45,9.DOI:10.11926/jtsb.4677
不同生长光强下8种红树植物幼苗叶片的光响应特征
Light Response Characteristics of Seedlings Leaves of Eight Mangrove Species Under Different Light Intensities
摘要
Abstract
Mangrove species are a group of trees,shrubs or herbs that grow in intertidal zones of tropical and subtropical coasts.They are generally categorized into true mangrove and semi-mangrove species according to their distribution.Understanding the eco-physiological strategies of light adaptation of mangrove species is of important theoretical significance to revealing the community assembly mechanisms of mangrove forests,and can provide scientific guidance for the reconstruction and transformation of mangrove forests.In order to reveal the physiological and ecological strategies to light conditions of mangrove plant species and provide theoretical guidance for optimal assembly of mangrove community structure,the light response characteristics in leaves of eight mangrove seedlings,such as Sonneratia apetala,Kandelia candel,Bruguiera gymnorrhiza,Aegiceras corniculatum,Acanthus ilicifolius,Acrostichum aureum,Heritiera littoralis and Hibiscus tiliaceus,grown under different light intensities,including 100%,45%,30%,and 10%of natural sunlight,were studied using shading control experiment.The results showed that the effects of growth light intensities on the photosynthetic light response characteristics were different among mangrove species.Shading significantly increased the maximum net photosynthetic rate(Pmax)of K.candel and B.gymnorrhiza,but had no significant effects on Pmax of other mangrove species.Kandelia candel had a higher Pmax under 45%light intensity treatment,while B.gymnorrhiza had higher Pmax under 45%and 30%light intensities.With the decrease of growth light intensity,the light saturation point of leaves of K.candel seedlings significantly increased,the light compensation points of B.gymnorrhiza,Acanthus ilicifolius and Acrostichum aureum appeared a decreasing trend,the apparent quantum yield of B.gymnorrhiza and Acrostichum aureum showed an increasing pattern,and the dark respiration rate of B.gymnorrhiza and Acrostichum aureum decreased.Therefore,it was suggested that B.gymnorrhiza,Acanthus ilicifolius and Acrostichum aureum are suitable for planting under forest with high canopy density,while S.apetala,K.candel,Aegiceras corniculatum,Heritiera littoralis and Hibiscus tiliaceus are suitable to be planted as upper layer species in mangrove forests or planted under forest with low canopy density.关键词
红树植物/遮荫/光合作用/光强Key words
Mangrove species/Shading/Photosynthesis/Light intensity引用本文复制引用
朱一民,李婷,孙当歌,叶万辉,沈浩..不同生长光强下8种红树植物幼苗叶片的光响应特征[J].热带亚热带植物学报,2024,32(1):37-45,9.基金项目
广东省林业科技创新项目(2017KJCX036,2019KJCX015) （2017KJCX036,2019KJCX015）
南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0408)资助This work was supported by the Project for Forestry Science and Technology Innovation in Guangdong(Grant No.2017KJCX036,2019KJCX015),and the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)(Grant No.GML2019ZD0408). （广州）
